Electric-lamp attachment.



W. P. MONEEL. ELECTRIC LAMP ATTAGHMENT. APPLIoATIoN FILED APB. 2a. 1912.

Patented 0@6.14,191"3.

I Inverrxteuga I by f V l I Attorneys lTo all 'whom itumayconcern':

UNITED. s TATEs .PATENT oFFIcE.

' WILLIAM PINKNEYMCNEEL, or sAN. ANTONIO, TEXAS.

-Y:ELEG'raro-Lam Ar'rAcnMEN'r.,

Be itlmown' that I, VVILUIAM a citizengof the United States, residing atSan Antonio, yin-,the-countyof Bexar and State of Texas, 'havel inyenteda new and useful Electric-Lamp Attachment, of which the following isaspecilication.

Thepresentfinvention relates to improvementsfielectric lamp attachments,the primary object `ofthis invention being the prof* f visionoiaflampsocketyattachment or-supl the line with the porting means in combinationwith av switch',

whereby;.the current energizing the filament of anincandescent lam is so controlled as to produce diii'erent edfrees` ofincandescence in l'-thefilament and thus produce different degrees of radiance to produce a dimg or a high light as ma be' desired.

A Vfurther object o the .present invention is the provision of a lampsocket attachment having a receptacle therein in which is mountedv anAindividual resistance, a switch 'having vthree terminal wires beingdisposed in operable-relationto said resistance and the contact platesof the socket, whereby the resistance`- maybe laced intoor out out ofament of the lamp, and thus produce a ,varying radiancyorincandescence'to the lfilament. l

With the lforegoingfandother objects in view which willfappear as the.description proceeds, the inventlonresides -in 4the com# bination andarrangement ofparts and in the details of ,construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosedcan be made within the scopeof what is claimed without departing from the spirit of the invention. A

In the drawings-Figure '1 is a view -showing the lamp socket attachmentbroken away toV show the interior construction thereof, with the switchcarrying member in elevation, the lamp socket and lamp bclng connected'.Fig. 2 is a section takenon line 2- 2 of Fig. 1. Fig. 3 is a sectiontaken on line 3 3 of Fig. 1. Fig. 4 is a detail view of the switchmember with the cover rei moved therefrom. Fig. 1s a diagramma-tic viewof the electrical c1rcu1t used 1n connection with the socket attachmentand.

designates .the body ot insulation, preferably made of porcelain, themain portion of Specification of Letters Patent.

l.fMcNnm., 1

is provided with the upper 'reduced cylindrii Paten-ted oct. 14;;913.- Iy VApplicationnimiaprn23,1912. serialmeaassr.

cal end'2 for removable lconnection' with a' socket S'. The main bodyportion of the member 1 is covered byffajmetal -casing 3V which carriesthe reduced lamp "receiving",

sleeve 4 in which is mounted the sleeve 'of' insulating material.'Disposed within' the sleeve 5 of'nsulating material is the lamp socketrecelving sleeve 6, which forms one of the terminals, as isthe'usualpractice,

while disposed concentrically through the.

body l and reduced end 2, is ai retaining rod g orl screw 7 whichformsthe'otherwterminal for the lamp L, the lower end of'the rod Z beinginsulated from the lamp socket 6 byff means of the disk 8 offinsulation. The.,

threaded terminal sleeve 10 is 'disposed upon the -reduced cylindrical'portion 2 and is provided with the terminal post 10', which projectswithin and at the `upper end of ,the

recess 11 formed in the body 1.

A contact pin 12 is connected to thesl'eeve' 6 and 'projects upwardly,so that the upper end thereof is within the lower end of the .i

recess or receptacle 11 and engages the co'ntact .plate 13 provided,with the' clips 14,.

These clips provide a means for the remov#y able reception of the lowerend of thelresistance strip lwhich is embedded inthe' spool 16 ofinsulation to provide a 'rea-dy.

means for carrying the resistance strip 15 and to also insulatethesamefrom the metal cover 3 should the same contact it when the cover is insealing posit-ion. The upper end 17 of the resistance coil ismconnectedtov a screw 18, from which is led a conductor 19 to the switch carryingmember 20. This switch carrying member 2O is disposed at any pointwithin a room to permit of the easy actuation thereof for controllingthe lamp L. A conductor 19 isled through the channel 21 of the switchmember 20.

The switch mem-her 20 hasconnected therein by means of the screw 22, aplate 24 to which is pivote-d the switch 25, the switch 25 beingprovided with an insulated handle 25 which is projected exteriorly ofthe switch body '20 so as to be readily operated to move the free arm 27of said switch 25 to the dotted and full line position as shown in Fig.4. The conductor 19 is connected to the contact terminal 28 carried bythe body 20 and secured in. position by means of the screw 29, while a4conductor 30 is led to thecontact plate 24 and is connected thereto bymeans ofthe 4screw 22,

thus establishing a circuit through the contacts 24 and 28v to includethe, resistance strip with the lamp L, as clearly shown generator G.

To more clearly show the use of the pres,-

ent invention, reference` should be had to the electrical diagram asshown in Fig. 5,

in which is shown the switch 25 open, and consequently the lamp Ldenergized. Should it be desired to produce a dim light or lowincandescence of, the lamp L, the

switch 25 is operated to bridge'the Contact plates 24: and 28 and thusclose a circuit from the generator G, to the conductor 30, Contact plate2&1, the l'switch 27, the contact plate 28, the conductor 19, resistance15, the conductor 33, the lamp Land the generator.

By this means it will be4 seen that the re` sistance 15, is carriedbodily by the lamp attaching-body 1 to be cut into the line and therebyreduce theamount of current efecting the filament of the lamp L and thusproduce the dim effect desired. Should, however, it bel desired to4throw`the lamp in'to the line, the switch 25 is moved' to the full lineposition Fig. 4, so as to bridge the contact plates 24 and 31 and thuscut out the resistance 15, completing a circuit from the generator Gr,conductor 30, the contact plate 2 4, the switch 25, contact plate 31,conductor 30, and the lamp L. Thus the full 'current from 'the generatoris thrown into the lamp L and the filament thereof is energized to itsfull incandescence.

From the foregoing description, taken in connection with the 'drawingsit is evident that the attachment 1 carries bodily its own resistanceand thus provides a means whereby any form of lamp of the incandescenttype may be attached thereto and have its filament aliected to producethe high or low light without any change in the construction of thefilament or the socket.

While herein is described the invention in detail, and4 is illustrated acombination embodyingV various features, which may at times be used toadvantage, it is not the desire or intention of claimant to be limitedto the particular arrangement shown, or t0 an arrangement'embodying thevarious aux iliary features, except as particularly pointed cutin theappended claim.

lVhat is claimedv is: 4

A lamp socket rheostat including .a body of insulation provided with arecess in one wall thereof, a reduced exteriorly threaded lamp socketengaging boss carried upon the upper end thereof, a. metal cap inclosingthe same, a concentrilcally disposed rod extending through the body fromend to end, the

upper end being insulated from the metal cap, a metal casino'inclosing'the body andl sealing the recess, the lower end of the sameicing constricted and threaded to receive the threaded end of a lamp, ametal socket fitted concentrioally WithinV the constricted end of themet-al casing and insulated therefrom and also from the concentric rod,a re sistance coil disposed within the recess, one terminal of the coilbeing electrically connected to the metal socket of the lconstrictedpci-tion of the casing, and three conductors one interposed between themet l socket engaging cap and the resistance, the second.

between the resistance andthe metal lamp engaging socket andthe thirddirectly con- ,necting the cap and socket..

In testimony that I'claim the foregoing as In own, I have hereto affixedmy signature in the presence of two witnesses.

W'ILLAM PINKNEY MGNEEL.

lVitnesses H. H. HOLLY, M. H. NlooLalnns.

